Good luck with that. We can all day long discuss what is free speech and not free speech but unless it’s a protected class or a carveout for payment processors it does not matter. Propose solutions instead. You could argue that payment processors control so much of the market that it’s like the government limiting speech but I would counter argue that they could use crypto easily.

Not to mention usually businesses use payment processors as the scape goat. Very few business, other than purpose built, want to deal with adult content.